Le informazioni raccolte dai satelliti NASA sono state per lungo tempo inaccessibili al grande pubblico, ma con la comparsa di Internet le modalità di condivisione sono diventate innumerevoli. Una delle varie proposte accolte per distribuire i dati…
"Although the finding has not yet been generalized to the full Boltzmann equation, it indicates that the particle description of a gas, when translated into a fluid description, converges not to the Navier-Stokes equations, but to the more general, far less famous Korteweg equations."
"Korteweg modeled the dynamics of fluids in which there is not only dissipation of energy (which is characterized by the Navier-Stokes equations), but also dispersion, or the smearing of energy into its component frequencies, as in a rainbow."
"Still, Gorban notes, his work with Karlin suggests that some gases of particles cannot even be captured by the Korteweg equations. When short-distance interactions between particles become strong enough, he said, such as at the edge of a shock wave, even capillarity cannot fully account for their behavior, and “there exist no hydrodynamics.”"
"The incompleteness of the Navier-Stokes equations becomes apparent in an old experiment that is often for sale in museum gift shops. The Crookes radiometer, a windmill housed inside a partial vacuum chamber made of glass, rotates when exposed to light. In 1879, Maxwell attempted to describe the turning vanes of the Crookes radiometer by modeling the thin air inside the vacuum chamber as a fluid. Maxwell determined that if the equations “given by Professor Stokes,” as he called them, told the full story of the fluid, the vanes would not turn."
The Problem with Hilbert’s 6th Problem
#mathematics #physics #navier_stokes #maxwell #korteweg #idealgas #fluiddynamics #science
Diretta RMC: http://bit.ly/RMConair
In short: Sailing Photographer and Astro-Photographer, Sailor, ex Airspace Engineer Student, ex Aircraft Pilot
I grew in a real international space, so I've a real wide mind....
I love sports, and I tried many.
I love technologies, it's why I study airspace (I'm not an astronaut.... in that case I just want be the pilot of the shuttle).
Fly is my life, I hope after the degree to restart it, in particular aerobatic, just amazing... Mean while, in the last period I tried sailing, at high level,.... and I could change to live only doing race boat........
motto 1: "People sleep peacefully in their beds at night only because rough men stand ready to do violence on their behalf.” George Orwell
motto 2: "Those who dream by day are cognizant of many things that escape those who dream only at night." Edgar Allan Poemotto 3: "K.I.S.S. = Keep It Simple, Stupid" Boeing
p.s.: I hate to write with the third person point of view........